Beacon Knit Jumpsuit
The jumpsuit that makes you reconsider jumpsuits.
Keyhole neckline with an open back that ties at the waist, flowing into wide legs that hit at the right length. Made from modal-blend jersey that moves with you — 74% modal, 23% polyester, 2% spandex for stretch that doesn't give up.
Navy is the one that works everywhere without trying too hard.
Wear it:
To dinner when you want to look put-together in one piece.
The wedding guest outfit that photographs well from behind.
Weekend errands when jeans feel too predictable.
Details & Fit
- Fit: Runs true to size
- Colors: Navy
- Sizes: XS–L
Frequently asked questions
How does the Beacon Knit Jumpsuit fit? It runs true to size across XS–L. If you're between sizes, we suggest sizing down for a closer fit.
Where is it designed? Quinn is designed in New York and has worked factory-direct since 2003.
Find Your Fit
Quinn / Size Guide
Measurement Diagram
| Measurement | 2 / XS | 4 / S | 6 / M | 8 / M | 10 / L | 12 / L |
|---|---|---|---|---|---|---|
| Bust | 34" | 35" | 36" | 37" | 38½" | 40" |
| Waist | 27" | 28" | 29" | 30" | 31½" | 32½" |
| Hip | 36" | 37" | 38" | 39" | 40½" | 41½" |
| Sleeves | 23½" | 24" | 24½" | 25" | 25½" | 26" |
| Measurement | 2 / XS | 4 / S | 6 / M | 8 / M | 10 / L | 12 / L |
|---|---|---|---|---|---|---|
| Waist | 26½" | 27½" | 28½" | 29½" | 31" | 32½" |
| Hip | 36" | 37" | 38" | 39" | 40½" | 42" |
| Thigh | 20¾" | 21½" | 22½" | 23½" | 24½" | 25½" |
| Inseam | 31" | 31" | 31" | 31" | 31" | 31" |
Measurement Diagram
| Measurement | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Chest | 34–36" | 38–40" | 42–44" | 46–48" | 50–52" |
| Neck | 14–14½" | 15–15½" | 16–16½" | 17–17½" | 18–18½" |
| Sleeve | 32–33" | 33–34" | 34–35" | 35–36" | 36–37" |
| Waist | 28–30" | 31–34" | 35–38" | 40–42" | 43–45" |
Sport Coats — Size to Chest
| Measurement | 38 | 40 | 42 | 44 | 46 | 48 | 50 |
|---|---|---|---|---|---|---|---|
| Chest | 38" | 40" | 42" | 44" | 46" | 48" | 50" |
Getting Measured
How to Measure
Stand relaxed and upright in a natural posture. Don't hold your breath. Have someone else measure you when possible — it makes a real difference in accuracy.
The tape should lie flat and snug — you should be able to slip two fingers underneath comfortably. Never pulled tight or left loose enough to sag.
Take measurements over form-fitting undergarments only. For outerwear and coats, measure over a thin base layer to account for wearing ease.
When measurements fall between two sizes, consult the fit notes below. For knitwear, size down for a fitted look. For woven styles, size up for ease.
Fit Philosophy
Our Fit, Explained
Our cashmere knits are cut with generous ease for layering. If between sizes, size down for a more refined, fitted silhouette — particularly for crewnecks and cardigans.
Woven shirts and blouses run true to Quinn sizing. Slim through the chest and shoulder with a clean contemporary line. Fit to your chest measurement first.
Trousers sit at the natural waist with a tailored leg opening. Always reference the bottoms chart. When waist and hip suggest different sizes, choose the larger.
Shoulder fit is non-negotiable — always fit a sport coat to your chest and shoulder first. The body can be altered; the shoulder cannot. Then size the trousers to waist.
Our one-size pieces are cut to an intentionally generous range. Each product page lists the flat measurements clearly so you can verify the fit before ordering.
Our team wears the clothes. If you're caught between sizes or have an unusual fit challenge, reach out — we'll match you to the right size and cut personally.
Still unsure? Our team knows the fit.
Field-tested advice from people who actually wear the clothes.
The jumpsuit that makes you reconsider jumpsuits.
Keyhole neckline with an open back that ties at the waist, flowing into wide legs that hit at the right length. Made from modal-blend jersey that moves with you — 74% modal, 23% polyester, 2% spandex for stretch that doesn't give up.
Navy is the one that works everywhere without trying too hard.
Wear it:
To dinner when you want to look put-together in one piece.
The wedding guest outfit that photographs well from behind.
Weekend errands when jeans feel too predictable.
Details & Fit
- Fit: Runs true to size
- Colors: Navy
- Sizes: XS–L
Frequently asked questions
How does the Beacon Knit Jumpsuit fit? It runs true to size across XS–L. If you're between sizes, we suggest sizing down for a closer fit.
Where is it designed? Quinn is designed in New York and has worked factory-direct since 2003.
Find Your Fit
Quinn / Size Guide
Measurement Diagram
| Measurement | 2 / XS | 4 / S | 6 / M | 8 / M | 10 / L | 12 / L |
|---|---|---|---|---|---|---|
| Bust | 34" | 35" | 36" | 37" | 38½" | 40" |
| Waist | 27" | 28" | 29" | 30" | 31½" | 32½" |
| Hip | 36" | 37" | 38" | 39" | 40½" | 41½" |
| Sleeves | 23½" | 24" | 24½" | 25" | 25½" | 26" |
| Measurement | 2 / XS | 4 / S | 6 / M | 8 / M | 10 / L | 12 / L |
|---|---|---|---|---|---|---|
| Waist | 26½" | 27½" | 28½" | 29½" | 31" | 32½" |
| Hip | 36" | 37" | 38" | 39" | 40½" | 42" |
| Thigh | 20¾" | 21½" | 22½" | 23½" | 24½" | 25½" |
| Inseam | 31" | 31" | 31" | 31" | 31" | 31" |
Measurement Diagram
| Measurement | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Chest | 34–36" | 38–40" | 42–44" | 46–48" | 50–52" |
| Neck | 14–14½" | 15–15½" | 16–16½" | 17–17½" | 18–18½" |
| Sleeve | 32–33" | 33–34" | 34–35" | 35–36" | 36–37" |
| Waist | 28–30" | 31–34" | 35–38" | 40–42" | 43–45" |
Sport Coats — Size to Chest
| Measurement | 38 | 40 | 42 | 44 | 46 | 48 | 50 |
|---|---|---|---|---|---|---|---|
| Chest | 38" | 40" | 42" | 44" | 46" | 48" | 50" |
Getting Measured
How to Measure
Stand relaxed and upright in a natural posture. Don't hold your breath. Have someone else measure you when possible — it makes a real difference in accuracy.
The tape should lie flat and snug — you should be able to slip two fingers underneath comfortably. Never pulled tight or left loose enough to sag.
Take measurements over form-fitting undergarments only. For outerwear and coats, measure over a thin base layer to account for wearing ease.
When measurements fall between two sizes, consult the fit notes below. For knitwear, size down for a fitted look. For woven styles, size up for ease.
Fit Philosophy
Our Fit, Explained
Our cashmere knits are cut with generous ease for layering. If between sizes, size down for a more refined, fitted silhouette — particularly for crewnecks and cardigans.
Woven shirts and blouses run true to Quinn sizing. Slim through the chest and shoulder with a clean contemporary line. Fit to your chest measurement first.
Trousers sit at the natural waist with a tailored leg opening. Always reference the bottoms chart. When waist and hip suggest different sizes, choose the larger.
Shoulder fit is non-negotiable — always fit a sport coat to your chest and shoulder first. The body can be altered; the shoulder cannot. Then size the trousers to waist.
Our one-size pieces are cut to an intentionally generous range. Each product page lists the flat measurements clearly so you can verify the fit before ordering.
Our team wears the clothes. If you're caught between sizes or have an unusual fit challenge, reach out — we'll match you to the right size and cut personally.
Still unsure? Our team knows the fit.
Field-tested advice from people who actually wear the clothes.